Ask HN: why is computer graphics research important?

Many areas of CS have "practical value": algorithms help us understand asymptotic speed of algorithms; security helps us avoid getting hacked; networks teach us how to deal with distributed, unreliable machines; machine learning helps us deal with noisy, large data sets; ... however, computer graphics research these days seems to be focused mainly on entertainment ... anyone here see what uses will come from it besides computer games / holly wood?